Tikal is easy from San Ignacio. Not a problem. We went in June last year and the rain showers were short lived. Sunny most of the time. There was only one night that a good storm blew in, and the nice breeze was pleasant. I wouldn't worry. Debbie
Don't let the term "rainy season" get to you. In June it may rain, and may not rain. It might go weeks without rain... however when it does rain, it's usually just a brief shower and you will welcome it!